Impact on porous targets: Penetration, crater formation, target compaction, and ejection

Using a granular-mechanics code, we study the impact of a sphere into a porous adhesive granular target, consisting of monodisperse silica grains. The model includes elastic repulsive, adhesive, and dissipative forces, as well as sliding, rolling, and twisting friction. Impact velocities of up to 30...

Descripción completa

Detalles Bibliográficos
Autores: Ringl, Christian, Bringa, Eduardo Marcial, Urbassek, Herbert M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/20473
Acceso en línea:http://hdl.handle.net/11336/20473
Access Level:acceso abierto
Palabra clave:Grains
Craters
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
id AR_bb9a44232bf2a0dd3c8d73dc4e776147
oai_identifier_str oai:ri.conicet.gov.ar:11336/20473
network_acronym_str AR
network_name_str Argentina
spelling Impact on porous targets: Penetration, crater formation, target compaction, and ejection Ringl, Christian Bringa, Eduardo Marcial Urbassek, Herbert M. Grains Craters https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 Using a granular-mechanics code, we study the impact of a sphere into a porous adhesive granular target, consisting of monodisperse silica grains. The model includes elastic repulsive, adhesive, and dissipative forces, as well as sliding, rolling, and twisting friction. Impact velocities of up to 30 m/s and target filling factors (densities) between 19% and 35% have been systematically studied. We find that the projectile is stopped by an effective drag force which is proportional to the square of its velocity. Target adhesion influences projectile stopping only below a critical velocity, which increases with adhesion. The penetration depth depends approximately logarithmically on the impact velocity and is inversely proportional to the target density. The excavated crater is of conical form and is surrounded by a compaction zone whose width increases but whose maximum value decreases with increasing target density. Grain ejection increases in proportion with impactor velocity. Grains are ejected which have originally been buried to a depth of 8Rgrain below the surface; the angular distribution favors oblique ejection with a maximum around 45◦. The velocity distribution of ejected grains features a broad low-velocity maximum around 0.5–1 m/s but exhibits a high-velocity tail up to ∼15% of the projectile impact velocity. Fil: Ringl, Christian. Universität Kaiserslautern; Alemania Fil: Bringa, Eduardo Marcial. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina Fil: Urbassek, Herbert M.. Universität Kaiserslautern; Alemania American Physical Society http://hdl.handle.net/11336/20473 Ringl, Christian; Bringa, Eduardo Marcial; Urbassek, Herbert M.; Impact on porous targets: Penetration, crater formation, target compaction, and ejection; American Physical Society; Physical Review E: Statistical, Nonlinear And Soft Matter Physics; 86; 6; 12-2012; 61313-61321 1539-3755 CONICET Digital CONICET
title Impact on porous targets: Penetration, crater formation, target compaction, and ejection
spellingShingle Impact on porous targets: Penetration, crater formation, target compaction, and ejection
Ringl, Christian
Grains
Craters
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Impact on porous targets: Penetration, crater formation, target compaction, and ejection
title_full Impact on porous targets: Penetration, crater formation, target compaction, and ejection
title_fullStr Impact on porous targets: Penetration, crater formation, target compaction, and ejection
title_full_unstemmed Impact on porous targets: Penetration, crater formation, target compaction, and ejection
title_sort Impact on porous targets: Penetration, crater formation, target compaction, and ejection
author Ringl, Christian
author_facet Ringl, Christian
Bringa, Eduardo Marcial
Urbassek, Herbert M.
author_role author
author2 Bringa, Eduardo Marcial
Urbassek, Herbert M.
author2_role author
author
topic Grains
Craters
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic_facet Grains
Craters
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description Using a granular-mechanics code, we study the impact of a sphere into a porous adhesive granular target, consisting of monodisperse silica grains. The model includes elastic repulsive, adhesive, and dissipative forces, as well as sliding, rolling, and twisting friction. Impact velocities of up to 30 m/s and target filling factors (densities) between 19% and 35% have been systematically studied. We find that the projectile is stopped by an effective drag force which is proportional to the square of its velocity. Target adhesion influences projectile stopping only below a critical velocity, which increases with adhesion. The penetration depth depends approximately logarithmically on the impact velocity and is inversely proportional to the target density. The excavated crater is of conical form and is surrounded by a compaction zone whose width increases but whose maximum value decreases with increasing target density. Grain ejection increases in proportion with impactor velocity. Grains are ejected which have originally been buried to a depth of 8Rgrain below the surface; the angular distribution favors oblique ejection with a maximum around 45◦. The velocity distribution of ejected grains features a broad low-velocity maximum around 0.5–1 m/s but exhibits a high-velocity tail up to ∼15% of the projectile impact velocity.
publishDate 2012
format article
status_str publishedVersion
url http://hdl.handle.net/11336/20473
identifier_str_mv Ringl, Christian; Bringa, Eduardo Marcial; Urbassek, Herbert M.; Impact on porous targets: Penetration, crater formation, target compaction, and ejection; American Physical Society; Physical Review E: Statistical, Nonlinear And Soft Matter Physics; 86; 6; 12-2012; 61313-61321
1539-3755
CONICET Digital
CONICET
language eng
eu_rights_str_mv openAccess
publisher American Physical Society
institution Consejo Nacional de Investigaciones Científicas y Técnicas
collection CONICET Digital (CONICET)
reponame_str CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
_version_ 1878403762527141888
publishDateSort 2012
author_browse Bringa, Eduardo Marcial
Ringl, Christian
Urbassek, Herbert M.
publisherStr American Physical Society
score 6,924472

Similares en LA Referencia